amos m



A. M. SHAFER.

Saw Set.

Patnted Nov. 12,- 1867.

'MPETERS. PMOTO-LJTHOGRAPMER, WASHINGTON. D. C.

AMOS M. SHAFElL-OF CAMDEN, OHIO.

Letters PatentNo. 70,751, dated November 12, 1867.

IMPROVEMENT IN SAW-SETS.

digs seen than it in flgttt ante-punt amt mating put at the smut.

TO WHOM IT MAY CONCERN:

Be it known that I, AMOS M. SHAFER, of Camden, Preblc county, Ohio, haveinvented a new-and useful Saw-Set; and I hereby declare the following tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making part of this specification.

This invention relates principally to aconstruction ofadjustable restsor holders for the punch and saw respectively, whereby the instrument ismade applicable to saws of various lengths, widths, thicknesses, andsets.

The invention also comprises a device for ready attachment of theinstrument to a stump or other fixed object.

Figure 1 is a side elevation of a saw-set embodying my improvements, oneof the gauges being shown detached and in perspective. I

Figure 2 is a front elevation, with one punch in the adjhstable andelastic holder, and two other punches adapted for different-sized teeth,shown in perspective, and detached.

A is a block, (preferably of the root or crotch of some hard wood,) fromwhose bottom projects a gimletpointed screw, B, by which .said block maybe attached to a stump or some other fixed object. Firmly attached tothe front upper portion of the block A is a steel anvil, C, a portion ofwhose top is declined rearward. The punches D I) D, although of diversedimensions of face, are all equal in their shanks, to fit and occupy thesquare or otherwise non-circular and tapering socket E of thepunch-holder, whose elastic arm, F, is bolted, at G, to the block A. Theflexibility of the arm F enables it to yield readily in obedience to theimpact of the mallet on the head of the punch, and its elasticityrestores it to the upper or starting position represented in thedrawing. It being convenient that the face of the punch should be heldas near as possible to the ivork,.the instrument being designed for useon saws of various thicknesses and sets, I provide a bolt, H, whichextends from thetop of the block through the spring-arm F, and beingscrew-threaded at 71., carries a nut, I, which being turned down or upon the bolt, serves to limit the contraction of the arm F, and to holdthe face of the punch as near to the work as the thickness and desiredset to be given will admit'of. KK are two steps or gauges havingupturned lips k, and slots is, to receive bolts L, by which said gaugesare attached to the top of the block A. The slots K enable the gauges tobe set more or less backward or forward, to suit different sizes ofsaw-teeth.

In order to enable the instrument to be used with any length or width ofsaw, and so as to give any desired set, I provide a rest for the saw,constructed in the following manner: M M are two brackets occupyingdove-tailed grooves, a, in the block A, and having slots, m, to receivescrew-bolts N, by which said brackets are attached to the block, theslots m permitting the brackets to be set more or less out from thefront of the block, according to the width of the saw. The front ends ofthe brackets terminate in crotches, O O, of slightly diiferentelevations, to receive a strip, P, which may be of wood, and has aportiomp, of its bottom edge formed obliquely to the top edge 12, tocorrespond with the ditfercnt elevations of the brackets. The portionpneed be no longer than is requisite for the required adjustment,- butthe strip P may extend in each direction beyond said portion to anydesired distance, according to the length of saw to be operated upon.Thuiiib s'crews Q Q enable the strip P to be securely held to anyspecific adjustment. When a considerable set is desired to be impartedto the saw-teeth, the strip or rest proper, P, is shifted to the right,so as to depress the back of the saw-blade, as in fig. 1, and for a lessdegree of set is shifted to the left. The bearing-board P affords alevel and continuous support for a saw of any length from one end to theother, so as to preserve the proper plane, without sagging, throughoutthe entire operation. Both ends of the board are simultaneously andequally elevated and depressed with the utmost accuracy, and withoutdisturbing the horizontality of the bearing surface, by simply shiftingthe board cndwise to the left or right. The adjustment once made, isabsolutely secure and permanent, because the bearing is directly uponthe unyielding surface of the brackets, and not in the direction of thetightening-screws Q.

I claim herein as new, and of my invcntionv 1. The screw-standard H hand hand-nut I, in combination with the spring F, constructed andoperating substantially as and for the purpose set forth.

2. Preserving the parallelism of the sliding rest P with the anvil, andat the same time changing itsJelative height with said anvil, by slidingthe inclined edge of the said rest in brackets M O Q, M O Q,substantially as described. I

In testimony of which invention I hereunto set my hand.

AMOS M. SHAFER.

Witnesses:

Gno. H. KNIGHT, JAMES H. LAYMAN.

